61results about How to "Increase the number of charge and discharge" patented technology

The invention discloses a water-cooled heat management system of an electric automobile battery pack. A power battery is fixed between an upper fixing baffle and a lower fixing baffle; a cooling separator is arranged tightly against the power battery; a cooling channel is disposed in the cooling separator, two ends of the cooling channel are communicated with a liquid inlet pipe and a liquid outlet pipe; the liquid inlet pipe is connected with a water pump through a liquid inlet connector; the liquid outlet pipe conveys heat transfer working media cooled by the cooling channel to a heat exchanger and a heating insulation water tank through a liquid outlet connector; the cooling separator is provided with a temperature sensor; and a BMS reads temperature data of the temperature sensor and controls the heat transfer working media conveyed to the inner portion of the cooling separator. The water-cooled heat management system solves the control of temperature of the battery pack when the battery is charged or discharged. The water-cooled system which is safe and reliable, has good operational performance, is convenient for maintenance and replacement and is capable of effectively regulating and controlling the working temperature of the battery is provided.

The invention belongs to the technical field of new materials for a lithium ion battery, and particularly relates to a preparation method of a silicon-based / graphene composite. The preparation method comprises the following steps of: taking a pole of the silicon-based / graphene composite as a working electrode and the pole of a lithium source-containing material as a counter electrode, assembling a battery together with propylene carbonate and lithium salt-containing electrolyte and a diaphragm; charging and discharging the battery to co-embed lithium ions and carbonate propylene ester into graphite layers under the action of electric field, so as to enable the graphite layers to be stripped; dismantling the battery, placing a lithium-embedded silicon-based / graphene composite precursor into dimethyl carbonate solution for soaking, and vaccumizing and drying; and conducting ultrasonic cleaning and lithium removal in diluted hydrochloric acid, vacuumizing and filtering, drying, and burning under inert gas atmosphere. Compared with the prior art, the preparation method is simple and controllable in procedures, low in cost, safe and environment-friendly and incapable of causing environment and health security risk; and a great deal of hydrogen can also be collected in the preparation process of the composite, so that economic benefits are obvious.

The invention discloses a preparation method of a lithium-ion battery. The method comprises a preparation process of positive paste and negative paste, wherein the positive paste and the negative paste are prepared through the process of mixing, soaking, dispersion and flocculation of a positive raw material and a negative raw material; the positive paste contains, by weight, 80-90 parts of a nickel-cobalt-manganese ternary material, 1-5 parts of a binder and 5-20 parts of a conductive agent; and the negative paste contains polytetrafluoroethylene which is added according to the proportion of60% of negative raw material paste, wherein the 60% of polytetrafluoroethylene contains 2 parts of carboxymethylcellulose. According to the method, the nickel-cobalt-manganese ternary material is adopted as the positive raw material of the lithium-ion battery first, the positive raw material is made into appropriate paste through pretreatment of the positive material and the paste making process of mixing, soaking and flocculation, and the positive paste is spread on an aluminum thin film to form the intact lithium-ion battery in cooperation with the functions of the negative material, an electrolytic solution and a membrane. The battery has the advantages that discharge voltage is high, safety is good, and repeated discharge can be performed multiple times cyclically.

The invention relates to a novel battery structure. The novel battery structure comprises a positive electrode material, a negative electrode material and a dynamic charging-discharging part, wherein the dynamic charging-discharging part is used for enabling the positive electrode material and the negative electrode material, which enter the dynamic charging-discharging part, to move or move oppositely at two sides of an exchange membrane, and is used for charging / discharging or is ready to charge or discharge in a movement or opposite moving process. According to the novel battery structure, the positive electrode material and the negative electrode material are in movement statuses in a discharging process, and thus, chemical reaction can be carried out fully and completely between the positive electrode material and the negative electrode material of the battery, the total ion operating distance of the exchange membrane is further shortened, the discharging speed is high, the internal resistance is further reduced, and the technical bottleneck of the conventional battery is broken.

The invention discloses an SOC estimation and equalization control system and method for an electric vehicle battery management system. The system comprises an acquisition module, a conversion module,a communication module, an SOC estimation module and an equalization module, wherein the acquisition module acquires parameter data; the conversion module converts the parameter data to obtain estimated input data; the communication module reads and transmits estimated input data; the SOC estimation module receives the estimation input data and performs estimation processing to obtain SOC value data; when the total current is smaller than zero, the equalization module selects the battery cells with the first target SOC values with the SOC values arranged in the front in an ascending order, and outputs a charging signal for charging; and when the total current is greater than or equal to zero, selecting the battery cells of the second target SOC value with the SOC values arranged in the front in a descending order, and outputting a discharge signal for discharging. By calculating the SOC value of the battery, equalization management is carried out when the electric quantity of the battery is inconsistent, safe use is realized, and the service life of the battery is prolonged.

The invention relates to a preparation method of an ultra-thin double-sided photoelectronic copper foil and the prepared copper foil. The method comprises the following steps of: adding alkylphenol polyoxyethylene ether sodium sulfonate, 1,3-thiazolidine-2-one and collagen in deionized water and dissolving to obtain an additive solution for ultra-thin copper foil production; under the condition of a copper sulphate electrolyte at a temperature of 20-90 DEG C, adding 5.0-10.0L of the additive solution in per cubic metre of the electrolyte per hour, uniformly stirring and then enabling the electrolyte to enter an electrolytic bath; and electrolysing the electrolyte in the electrolytic bath under an electrolytic current density of 2000-6000A / m<2>, and carrying out an electrochemical reaction to generate the ultra-thin double-sided photoelectronic copper foil. The ultra-thin double-sided photoelectronic copper foil manufactured by the process disclosed by the invention has the following performance: the thickness is small and uniform, the roughness of a rough surface is moderate and uniform, the two sides of the copper foil are smooth and bright, the surface tension of the copper foil is high, the adhesion force of lithium-ion negative electrode active materials can be effectively increased, the electric capacity and charge-discharge times of a battery are increased, and the service life of the battery is prolonged.

The invention discloses an electronic mousetrap, and relates to the technical field of animal catching. The electronic mousetrap includes a box body and a controller arranged on the box body, a movable first gate and a movable second gate are arranged at the two ends, opposite to each other, of the box body, the first gate is arranged on the controller and can move under the control of the controller, and the bottom surface, corresponding to the second gate, of the box body is provided with a switch used for controlling the opening or closing of the second gate; the inner portion of the box body is divided by two sets of one-way doors into three spaces, namely, the first level trap, the second level trap and the third level trap; the bottom of the box body is provided with a first sensor and a second sensor, the first sensor and the second sensor are arranged on the bottom surface of the first level trap and the bottom surface of the second level trap respectively, and both the first sensor and the second sensor are connected with the controller so as to control the opening or closing of the first gate. The electronic mousetrap can be used for catching mice continuously.